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Data last updated on 2021-04-22 @ 07:02:11am (EST)

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.38-40 Win

In Stock 38-40 WIN Ammo For Sale- Coupons & Bulk Ammo Deals

The .38-40 Winchester is actually a .40 caliber cartridge shooting .401 caliber bullets. The cartridge was introduced by Winchester in 1874 and is derived from their .44-40 Winchester. 38-40 ammo is a very interesting round that is quite unique. Typically, rounds from the western-era were named for their caliber, and then the amount of propellant used.

The 38-40 is a black powder western round that was also known as the 38 WCF aka Winchester centerfire. It is used primarily by younger shooters looking for an easy to handle round. 


About .38-40 Win

  • Type:  Pistol
  • Place of origin:   United States
  • Designer:  Winchester Repeating Arms Company
  • Produced 1874 to 1937: now in production again.


  • Parent case: .44-40 Winchester
  • Case type rimmed: bottlenecked
  • Bullet diameter: .401 in (10.2 mm)
  • Neck diameter: .416 in (10.6 mm)
  • Shoulder diameter: .4543 in (11.54 mm)
  • Base diameter: .465 in (11.8 mm)
  • Rim diameter: .520 in (13.2 mm)
  • Rim thickness: .058 in (1.5 mm)
  • Case length:  1.30 in (33 mm)
  • Overall length: 1.59 in (40 mm)

Ballistic performance

Bullet mass/type Velocity Energy
180 gr (12 g) SP 1,160 ft/s (350 m/s) 538 ft⋅lbf (729 J)

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